Re: fix a few missing return value checks in scsi

Jeff Garzik
2003-12-31T14:35:46Z

Arjan van de Ven wrote:
> Hi,
>
> The attached patch adds a few error checks for the pci dma_mask setting
> routines, which after all can fail and thus need their return code
> checked.
>
> Greetings,
> Arjan van de Ven
>
>
> ------------------------------------------------------------------------
>
> --- linux-2.6.0-test11/drivers/scsi/aic7xxx/aic7xxx_osm.c.OLD 2003-12-19 16:26:15.000000000 -0500
> +++ linux-2.6.0-test11/drivers/scsi/aic7xxx/aic7xxx_osm.c 2003-12-19 16:29:17.000000000 -0500
> @@ -1408,12 +1408,18 @@
> * our dma mask when doing allocations.
> */
> if (ahc->dev_softc != NULL)
> - ahc_pci_set_dma_mask(ahc->dev_softc, 0xFFFFFFFF);
> + if (ahc_pci_set_dma_mask(ahc->dev_softc, 0xFFFFFFFF)) {
> + printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n");
> + return (ENODEV);
> + }
> *vaddr = pci_alloc_consistent(ahc->dev_softc,
> dmat->maxsize, &map->bus_addr);
> if (ahc->dev_softc != NULL)
> - ahc_pci_set_dma_mask(ahc->dev_softc,
> - ahc->platform_data->hw_dma_mask);
> + if (ahc_pci_set_dma_mask(ahc->dev_softc,
> + ahc->platform_data->hw_dma_mask)) {
> + printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n");
> + return (ENODEV);
> + }
> #else /* LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0) */
> /*
> * At least in 2.2.14, malloc is a slab allocator so all
> --- linux-2.6.0-test11/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c.OLD 2003-12-19 16:30:32.000000000 -0500
> +++ linux-2.6.0-test11/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c 2003-12-19 16:31:43.000000000 -0500
> @@ -168,7 +168,10 @@
> ahc->flags |= AHC_39BIT_ADDRESSING;
> ahc->platform_data->hw_dma_mask = mask_39bit;
> } else {
> - ahc_pci_set_dma_mask(pdev, 0xFFFFFFFF);
> + if (ahc_pci_set_dma_mask(pdev, 0xFFFFFFFF)) {
> + printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n");
> + return (-ENODEV);
> + }
> ahc->platform_data->hw_dma_mask = 0xFFFFFFFF;
> }
> #endif
> --- linux-2.6.0-test11/drivers/scsi/aic7xxx/aic79xx_osm.c.OLD 2003-12-19 16:34:01.000000000 -0500
> +++ linux-2.6.0-test11/drivers/scsi/aic7xxx/aic79xx_osm.c 2003-12-19 16:35:11.000000000 -0500
> @@ -1776,12 +1776,18 @@
> * our dma mask when doing allocations.
> */
> if (ahd->dev_softc != NULL)
> - ahd_pci_set_dma_mask(ahd->dev_softc, 0xFFFFFFFF);
> + if (ahd_pci_set_dma_mask(ahd->dev_softc, 0xFFFFFFFF)) {
> + printk(KERN_WARNING "aic79xx: No suitable DMA available.\n");
> + return (ENODEV);
> + }
> *vaddr = pci_alloc_consistent(ahd->dev_softc,
> dmat->maxsize, &map->bus_addr);
> if (ahd->dev_softc != NULL)
> - ahd_pci_set_dma_mask(ahd->dev_softc,
> - ahd->platform_data->hw_dma_mask);
> + if (ahd_pci_set_dma_mask(ahd->dev_softc,
> + ahd->platform_data->hw_dma_mask)) {
> + printk(KERN_WARNING "aic79xx: No suitable DMA available.\n");
> + return (ENODEV);
> + }
> #else /* LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0) */
> /*
> * At least in 2.2.14, malloc is a slab allocator so all

No offense to you personally, but this is a bunch of crap. aic7xxx
needs to use the standard kernel APIs for pci_set_dma_mask and
pci_set_consistent_dma_mask...

We don't need a wrapper for every kernel API function :(

Jeff